Some problems here due to the limited number of words in the English language :). Sentient appears to be:
1. a Progressive/Black Metal band from Pelotas city, in Brazil. 2. a Gothic/Doom Metal band from Dordrecht, The Netherlands, with relations to Al Akhirah and Footfalls. The songs available for download below, Solitude's caress and Fallen angel under sallow talion are songs recorded by the Dutch band. 3. a side proyect of theta frontman.